Place chicken in slow cooker sprayed with cooking spray; sprinkle with seasoning mix. Turn to evenly coat both sides of each chicken breast with seasoning mix.
Top with beans and chiles. Pour chicken broth over ingredients in slow cooker; cover with lid. Cook on LOW 6 to 8 hours (or on HIGH 2 to 4 hours).
Remove chicken from slow cooker; pull into shreds with 2 forks. Return to slow cooker. Add Neufchatel cheese and half the cheddar cheese; mix well. Top with remaining cheddar. Cook, covered, 10 to 15 min. or until cheese is melted and chicken mixture is heated through.
Sprinkle with cilantro. Serve with WHEAT THINS for dipping.